From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 23 May 2013 16:10:21 +0000 (+0200)
Subject: cfg80211: check wdev->netdev in connection work
X-Git-Tag: v3.4.92~20
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=377929f225ac24146fda8c5401553e556872a705;p=unionfs-2.6.27.y.git

cfg80211: check wdev->netdev in connection work

commit c815797663b72e3ac1736f1886538152bc48e4af upstream.

If a P2P-Device is present and another virtual interface triggers
the connection work, the system crash because it tries to check
if the P2P-Device's netdev (which doesn't exist) is up. Skip any
wdevs that have no netdev to fix this.

Reported-by: YanBo <dreamfly281@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Qiang Huang <h.huangqiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index f7e937ff897..3fd50a11c15 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -222,6 +222,9 @@ void cfg80211_conn_work(struct work_struct *work)
 	mutex_lock(&rdev->devlist_mtx);
 
 	list_for_each_entry(wdev, &rdev->netdev_list, list) {
+		if (!wdev->netdev)
+			continue;
+
 		wdev_lock(wdev);
 		if (!netif_running(wdev->netdev)) {
 			wdev_unlock(wdev);